Sometimes I'd like to play around with popping over a few fences, but I don't feel like going to the trouble of building standards. (Realistically, I don't know how good a carpenter I would be anyway.) Does anybody have any ideas of other stuff that could be re-purposed into jumps? I thought of using hay bales but discarded that idea because it involves moving the bales to where I want to use them and then putting them back in the hay shed when I'm done, and they're heavy! LOL. Maybe some of those stackable plastic storage crates? PVC pipe?